Hello, dear friends
I’m starting my IoT development journey, and I really liked the support documentation both on the website and here.
I’m testing the modules present in the BG95-M3 modem and I’m currently having difficulties handling serial communication tests between the QuecPython terminal and the information return port. To perform this procedure, I used this post as a basis.
uart development
I’ve tried everything or almost everything, but now I’m trying to write and read strings on the terminal and on the COM port without success.
My setup:
-
Quectel BG95-M3 40pin out PCBA LPWA GSM NBIOT CATM Module Mini Development Board with GPS Receiver
-
USB 2.0 to TTL UART Serial Converter Adapter Programmable Module CH340 CH340G for Arduino 3.3V 5V Replace CP2102
Also adding images of the documentation that the seller provided me:
Code:
import _thread # Import thread module
import utime # Import timing module
import log # Import log module
from machine import UART # Import UART module
# Set log output level
log.basicConfig(level=log.INFO)
uart_log = log.getLogger("UART")
uart = UART(UART.UART1, 115200, 8, 0, 1, 0)
def uartWrite():
global uart
count = 10
while count:
write_msg = "Hello count={}".format(count)
uart.write(write_msg)
uart_log.info("Write msg :{}".format(write_msg))
utime.sleep(1)
count -= 1
uart_log.info("uartWrite end!")
def UartRead():
global uart
while 1:
msgLen = uart.any()
utime.sleep(0.1)
# Read when there exists data
if msgLen:
msg = uart.read(msgLen)
utf8_msg = msg.decode()
uart_log.info("UartRead msg: {}".format(utf8_msg))
else:
continue
def run():
_thread.start_new_thread(UartRead, ())
_thread.start_new_thread(uartWrite, ())
if __name__ == "__main__":
run()
while True:
utime.sleep(0.5)
Drivers:
QuecPtyhon Terminal = Quectel Incorporated_2024-06-27_version30.0.72.20
COM Port = wch.n_2024-09-16_3.9.2024.9
Schematic:
GND = PIN 1 Development Board
RX(COM Port UART) - D-TXD Pin 3 Development Board
TX(COM Port UART) - D-RXD Pin 4 Development Board
P.s: I have also tried using the MAIN PORT (MAIN-TXD and MAIN-RXD), modifying the code to UART2.
Thanks for your attention and feel free to help me.
